Question

define micro straining​

Answer 1

Although dimensionless, strain is sometimes expressed in units such as in./in. or mm/mm. In practice, the magnitude of measured strain is very small, so it is often expressed as microstrain (µε), which is ε x 10-6. Figure 1. Strain is the ratio of the change in length of a material to the original, unaffected length.

Answer 2

Strain is defined as the amount of deformation per unit length of an object when a load is applied. ... Typical values for strain are less than 0.005 inch/inch and are often expressed in micro-strain units: Strain may be compressive or tensile and is typically measured by strain gages.